Set NTP on Windows Client
Set the NTP server:
> NET TIME /SETSNTP:$ip-of-ntp-server
By default, the Windows NTP client is really braindead, it just
'sets' the system clock once a day, its not a proper NTP
implementation. for most users, this is fine, but realize oddities can
happen like the clock being set back a few seconds such that a given
time happens twice.
You can modify the time interval by editing your registry.
[HKEY_LOCAL_MACHINESYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient]
"SpecialPollInterval"=dword:00001c20
This will set it to update every two hours. The dword can be modified to
set it for 1 hour to whatever.